<!-- 1 template  -->
<template>

  <h3>APP的内容</h3>



  <div class="child">
    <WatchEffect></WatchEffect>
  </div>




</template>

<!-- 2 script -->
<script setup lang="ts" name='App'>
import WatchEffect from "./components/WatchEffect.vue";




</script>

<!-- 3 style -->
<style scoped>
.child {

  border: solid 1px grey;
}
</style>